I could decease you could decease she could decease we could decease you could decease they could decease
Forme en V-ing
I could be deceasing you could be deceasing she could be deceasing we could be deceasing you could be deceasing they could be deceasing
Perfect
I could have deceased you could have deceased she could have deceased we could have deceased you could have deceased they could have deceased
Perfect en V-ing
I could have been deceasing you could have been deceasing she could have been deceasing we could have been deceasing you could have been deceasing they could have been deceasing
Négation
Forme simple
I couldn't decease you couldn't decease she couldn't decease we couldn't decease you couldn't decease they couldn't decease
Forme en V-ing
I couldn't be deceasing you couldn't be deceasing she couldn't be deceasing we couldn't be deceasing you couldn't be deceasing they couldn't be deceasing
Perfect
I couldn't have deceased you couldn't have deceased she couldn't have deceased we couldn't have deceased you couldn't have deceased they couldn't have deceased
Perfect en V-ing
I couldn't have been deceasing you couldn't have been deceasing she couldn't have been deceasing we couldn't have been deceasing you couldn't have been deceasing they couldn't have been deceasing
Forme interrogative
Forme simple
could I decease? could you decease? could she decease? could we decease? could you decease? could they decease?
Forme en V-ing
could I be deceasing? could you be deceasing? could she be deceasing? could we be deceasing? could you be deceasing? could they be deceasing?
Perfect
could I have deceased? could you have deceased? could she have deceased? could we have deceased? could you have deceased? could they have deceased?
Perfect en V-ing
could I have been deceasing? could you have been deceasing? could she have been deceasing? could we have been deceasing? could you have been deceasing? could they have been deceasing?
Forme interro-négative
Forme simple
couldn't I decease? couldn't you decease? couldn't she decease? couldn't we decease? couldn't you decease? couldn't they decease?
Forme en V-ing
couldn't I be deceasing? couldn't you be deceasing? couldn't she be deceasing? couldn't we be deceasing? couldn't you be deceasing? couldn't they be deceasing?
Perfect
couldn't I have deceased? couldn't you have deceased? couldn't she have deceased? couldn't we have deceased? couldn't you have deceased? couldn't they have deceased?
Perfect en V-ing
couldn't I have been deceasing? couldn't you have been deceasing? couldn't she have been deceasing? couldn't we have been deceasing? couldn't you have been deceasing? couldn't they have been deceasing?